Malicious PDF — malware analysis report

Static analysis result for SHA-256 829980d62a98cc7e…

MALICIOUS

PDF

34.4 KB Created: 2021-07-05 11:28:02 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 8c947ac16f110650ae3b092ca37836c3 SHA-1: df31fb7593c653b162c93d272cc69a6c29d01e47 SHA-256: 829980d62a98cc7e779661329048546bededa8db21a68fb6768a1de24f5e8a47
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF document contains numerous links and references to 'free Robux' and 'Coin Master' hacks, indicating a lure for users seeking in-game advantages. The heuristic firings confirm the presence of external URIs and a specific lure for game hacks. The document body explicitly contains the URL http://netcdn.tw/app/431946152/free-roblox-accounts-with-robux-that-work-2021-game-hack, which is likely the primary malicious destination.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 4

  • PDF links to a 'free generator / game hack' redirector high PDF_GAME_HACK_REDIRECT_LURE
    PDF's clickable action targets a redirector of the form /app/<id>/<slug>-game-hack — the landing-page shape of a large SEO 'free spins / generator / game hack' lure family that funnels victims through rotating disposable hosts to a malware/scam payload. The multi-link variants also trip ML/link-farm rules; this catches the single-link variants that otherwise score clean.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • External URI info PDF_URI
    PDF contains an external URL action
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL http://netcdn.tw/app/431946152/free-roblox-accounts-with-robux-that-work-2021-game-hack PDF link annotation
    • http://artistaone.co/userfiles/files/coin-master-free-cards-link-2021_GM406889139.pdfIn PDF document text
    • http://artistaone.co/userfiles/files/10-free-robux_GM431946152.pdfIn PDF document text
    • http://artistaone.co/userfiles/files/roblox-boku-no-roblox-remastered-hack-script_GM431946152.pdfIn PDF document text
    • http://artistaone.co/userfiles/files/how-to-actually-get-free-robux_GM431946152.pdfIn PDF document text
    • http://artistaone.co/userfiles/files/coin-master-hack-online-no-human-verification_GM406889139.pdfIn PDF document text
    • http://artistaone.co/userfiles/files/hacked-roblox-game_GM431946152.pdfIn PDF document text
    • http://artistaone.co/userfiles/files/coin-master-hack-iphone_GM406889139.pdfIn PDF document text
    • http://artistaone.co/userfiles/files/roblox-free-robux-generator_GM431946152.pdfIn PDF document text
    • http://artistaone.co/userfiles/files/coin-master-free-box_GM406889139.pdfIn PDF document text
    • http://artistaone.co/userfiles/files/free-robux-generator-2021-no-human-verification-or-survey_GM431946152.pdfIn PDF document text
    • http://artistaone.co/userfiles/files/how-to-get-free-outrageous-builders-club-on-roblox-2021_GM431946152.pdfIn PDF document text
    • http://artistaone.co/userfiles/files/roblox-download-free-windows-xp_GM431946152.pdfIn PDF document text
    • http://artistaone.co/userfiles/files/roblox-anomaly-breach-cheats_GM431946152.pdfIn PDF document text
    • http://artistaone.co/userfiles/files/hack-robux_GM431946152.pdfIn PDF document text
    • http://artistaone.co/userfiles/files/minecraft-free-unblocked_GM479516143.pdfIn PDF document text
    • http://artistaone.co/userfiles/files/how-to-get-free-robux-without-verifying-2021_GM431946152.pdfIn PDF document text
    • http://artistaone.co/userfiles/files/robux-miner_GM431946152.pdfIn PDF document text
    • http://artistaone.co/userfiles/files/spam-click-free-robux-script-v3rmillion_GM431946152.pdfIn PDF document text
    • http://artistaone.co/userfiles/files/how-to-hack-steal-roblox-account_GM431946152.pdfIn PDF document text
    • http://artistaone.co/userfiles/files/minecraft-coins-free_GM479516143.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00002e4d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2E4D 22000 bytes
SHA-256: d316fcaefdfbd29061b4d536e1f5e38810366d28faab7ae92d13c44b557a4db2
font_01_sfnt_off00005eed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5EED 19948 bytes
SHA-256: 25c875579330c816dc270a6cc831986c277f5cf3e4bf50255e97f253356454b0

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